Iters



(No Model.) D. T.-GRAY.

PROCESS OF AND MACHINERY FOR REFINING AND PURIFYING PARAFFINE AND OTHER WAXY MATERIALS.

No. 250,524. Patented Dec. 6,1881.

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UNITED STATES PATENT OFFICE.

DANIEL T. GRAY, OF BROOKLYN, ASSIGNOR, BY MESNE ASSIGNMENTS, TO JOHN A. STOUTENBURGH, OF NEW YORK, N. Y.

PROCESS OF AND MACHINERY FOR REFINING AND PURlFYlNG PARAFFlNE AND OTHER WAXY MATERIALS.

SPECIFICATION forming part of Letters Patent No. 250,524, dated December 6, 1881.

Application filed May 2, 1881. (No model.)

T all whom it may concern:

Be it known that I, DANIEL T. GRAY, of Brooklyn, in the State of New York, have invented a new and Improved Process of and Machineryt'or RefiningandPurifyingPar-affine and other Waxy Materials; and I hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specification, in which- Figurel is a sectional elevation, showing the general plan of the devices used to carry out my process. Fig. 2 is a view, partiallyin sec tion and partly in elevation, showing the press.

The object of my invention is to purify and refine paraffine and other waxy matters; and my invention consists in a series of consecutive steps of treatment, as hereinafter fully described and claimed.

In order that those skilled in the art may make and use my invention, I will proceed to describe the manner in which I have carried it out.

In the said drawings, A represents an airpump, B an air-receiver, and (J a pipeleading to a coil, D, located in a furnace for highly heating the air from the receiver and conveying it to a tank, E, in which is placed the crude paraffine or other waxy matters and the accompanying impurities, with asolvent, preferably naphtha. The end of pipe 0 passes almost to the bottom of tank E, and as the heated air is driven into the tank it passes through the mass ofmaterial to be refined and cutsituntilitisthoroughly dissolved. Asthc mass is melted a large proportion of the naphtha is driven 011' and passes through pipe W to a condensing-coil, N, where it is condensed and saved for further use. As soon as the 40 mass is thoroughly cut it is run through pipe a into a filter, G, which is surrounded by a jacket, H, into which is introduced hot air under pressure through pipe K. This hot air keeps the mass fluid and assists in forcing the paraffine and remaining solvent out through 5 pipe I, leaving the earthy matters and other impurities in the filter. The parnfine falls through pipe I into cans S, and as the cans are filled they are conveyed to freezing-chamber P, which is supplied withair from receiver 13 after it has passed through a coil, T, immersed in a refrigerating mixture. As soon as the cans of paraffiue are frozen, and this is done quickly, they are emptied into a press, R, where a heavy pressure is put on the mass to squeeze out all of the liquid solvent remaining. After the pressing step the paraffine is placed in a closed chamber, L, into which, through pipe 0, is forced steam or hot air to again out the paraffine and drive off all remaining traces of the naphtha. The paraffine will then be found, on solidifying, to be in a white pure condition for market.

I am aware that a variety of means have been employed to refine waxy matters, in which they have been heated or dissolved; and hence I do not broadly claim any one of the various steps, but confine my invention to the series of consecutive steps as described and hereinafter claimed. 0

Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent, is

The process herein described for purifying and refining paraffiue and other waxy matters, consisting, essential1y,in subjecting the crude wax to a solvent and heated air, under pressure, in a closed vessel, passing the mixture through a filter provided with a heating-jacket, to remote the earthy matters, then freezing the waxin a closed chamber, then compressing it to remove the solvent, and then again melting it. by steam or hot air to drive oifall traces of the solvent, for the purpose set forth.

DANIEL T. GRAY.

WVitnesses:

A. H. EVANS, JNo. L. CoNDRoN. 

